Reaching for better image quality and lower radiation dose in head and neck CT: advanced modeled and sinogram-affirmed iterative reconstruction in combination with tube voltage adaptation

Journal article


Publication Details

Author(s): Schmid A, Uder M, Lell M
Journal: Dentomaxillofacial Radiology
Publication year: 2016
Pages range: 20160131
ISSN: 0250-832X


Abstract

The aim of this study was to evaluate image quality and radiation dose in low-dose head and neck CT comparing two different commercially available iterative reconstruction algorithms: sinogram-affirmed iterative reconstruction (SAFIRE) and advanced modeled iterative reconstruction (ADMIRE) with fixed and automated tube voltage adaptation (TVA).CT examinations of 103 patients were analysed. 58 patients were examined on a single-source CT at fixed tube voltage of 120 kV and reconstructed with filtered back projection (FBP) and SAFIRE (Strength Level 3). 45 patients were examined in a single-source mode on a dual-source CT with automated TVA and reconstructed with FBP and ADMIRE (Strength Levels 2 and 3). Image noise was calculated in seven anatomical volumes of interest. Subjective evaluation of the CT images was performed using a four-grade scale.Mean CT numbers of FBP and the corresponding iterative reconstruction did not differ significantly (p = 0.74-0.99). Image noise was lower with both iterative reconstruction techniques than with FBP (SAFIRE 3: -22.3%; ADMIRE 2: -14.9%; ADMIRE 3: -24.2%; all p < 0.05); hence, the signal-to-noise ratio and the contrast-to-noise values were higher. Subjective image quality revealed a more favourable result for the iterative reconstruction. ADMIRE 3 in combination with automated TVA showed 14.4% (p < 0.05) less image noise with a 7.5% lower radiation dose than SAFIRE 3 with fixed tube voltage.Higher image quality at lower radiation dose can be achieved using ADMIRE in combination with automated TVA.


FAU Authors / FAU Editors

Lell, Michael Prof. Dr.
Medizinische Fakultät
Schmid, Andrea Dr.
Lehrstuhl für Diagnostische Radiologie
Uder, Michael Prof. Dr.
Lehrstuhl für Diagnostische Radiologie


How to cite

APA:
Schmid, A., Uder, M., & Lell, M. (2016). Reaching for better image quality and lower radiation dose in head and neck CT: advanced modeled and sinogram-affirmed iterative reconstruction in combination with tube voltage adaptation. Dentomaxillofacial Radiology, 20160131. https://dx.doi.org/10.1259/dmfr.20160131

MLA:
Schmid, Andrea, Michael Uder, and Michael Lell. "Reaching for better image quality and lower radiation dose in head and neck CT: advanced modeled and sinogram-affirmed iterative reconstruction in combination with tube voltage adaptation." Dentomaxillofacial Radiology (2016): 20160131.

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Last updated on 2018-10-10 at 02:30